Diff: main.cpp

Revision:

0:d3c85ea81493

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Mar 03 23:57:55 2012 +0000
@@ -0,0 +1,221 @@
+#include "lwip/opt.h"
+#include "lwip/stats.h"
+#include "lwip/sys.h"
+#include "lwip/pbuf.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+#include "lwip/dns.h"
+#include "lwip/dhcp.h"
+#include "lwip/init.h"
+#include "lwip/netif.h"
+#include "netif/etharp.h"
+#include "netif/loopif.h"
+#include "device.h"
+
+#include "mbed.h"
+
+
+// ----------------------------------------------------------------------------
+// This part is added in order to complete compiling without errors.
+// ----------------------------------------------------------------------------
+#include "string.h"
+
+#define IFNAME0 'E'
+#define IFNAME1 'X'
+
+#define min(x,y) (((x)<(y))?(x):(y))
+
+extern Ethernet *eth;
+extern struct netif *gnetif;
+
+static err_t device_output(struct netif *netif, struct pbuf *p) {
+  #if ETH_PAD_SIZE
+    pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
+  #endif
+
+  do {
+    eth->write((const char *)p->payload, p->len);
+  } while((p = p->next)!=NULL);
+
+  eth->send();
+
+  #if ETH_PAD_SIZE
+    pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
+  #endif
+  
+  LINK_STATS_INC(link.xmit);
+  return ERR_OK;
+}
+
+void device_poll() {
+  struct eth_hdr *ethhdr;
+  struct pbuf *frame, *p;
+  int len, read;
+
+  while((len = eth->receive()) != 0) {
+      frame = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
+      if(frame == NULL) {
+          return;
+      }
+      p = frame;
+      do {
+         read = eth->read((char *)p->payload, p->len);
+         p = p->next;
+      } while(p != NULL && read != 0);
+      
+      #if ETH_PAD_SIZE
+          pbuf_header(p, ETH_PAD_SIZE);
+      #endif
+
+      ethhdr = (struct eth_hdr *)(frame->payload);
+
+      switch(htons(ethhdr->type)) {
+          
+          case ETHTYPE_IP:
+              etharp_ip_input(gnetif, frame);
+              pbuf_header(frame, -((s16_t) sizeof(struct eth_hdr)));
+              gnetif->input(frame, gnetif);
+              break;
+          
+          case ETHTYPE_ARP:
+              etharp_arp_input(gnetif, (struct eth_addr *)(gnetif->hwaddr), frame);
+              break;
+          
+          default:
+              break;
+      }
+      pbuf_free(frame);
+  }
+}
+
+err_t device_init(struct netif *netif) {
+  LWIP_ASSERT("netif != NULL", (netif != NULL));
+  
+  NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 0x2EA);
+  
+  /* maximum transfer unit */
+  netif->mtu = 0x2EA;
+  
+  /* device capabilities */
+  /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
+  netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
+
+  netif->state = NULL;
+  gnetif = netif;
+
+  netif->name[0] = IFNAME0;
+  netif->name[1] = IFNAME1;
+
+  /* We directly use etharp_output() here to save a function call.
+   * You can instead declare your own function an call etharp_output()
+   * from it if you have to do some checks before sending (e.g. if link
+   * is available...) */
+  netif->output          = etharp_output;
+  netif->linkoutput      = device_output;
+
+  eth = new Ethernet();
+
+  return ERR_OK;
+}
+
+void device_address(char *mac) {
+    eth->address(mac);
+}
+
+// ----------------------------------------------------------------------------
+// The end of the part added.
+// ----------------------------------------------------------------------------
+
+
+DigitalOut led(LED1);
+
+/* Struct with hold the Ethernet Data */
+struct netif    netif_data;
+
+/* Every time called if a packet is received for a */
+/* TCPConnection which registerd this Callback. */
+err_t recv_callback(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) {
+    printf("recv_callback\n");
+    if (p==NULL) {
+        printf("Connection closed by server!\n");
+        return ERR_OK;
+    }
+
+    while (p) {
+        char * ch = (char*)p->payload;
+        printf("\n>>>>>>>>>>>>\n");
+        for (int i=0; i < p->len; i++) {
+            printf("%c", ch[i]);
+        }
+        printf("\n<<<<<<<<<<<<\n");
+        p = p->next;
+    }
+    tcp_recved(pcb, p->tot_len);
+    pbuf_free(p);
+    return ERR_OK;
+}
+
+/* Connection etablished, lets try to get a http page */
+err_t connected_callback(void *arg, struct tcp_pcb *pcb, err_t err) {
+    tcp_recv(pcb, &recv_callback);
+    printf("Connected Callback!\n");
+    char msg[] = "GET / HTTP/1.1\r\nHost: www.google.co.uk\r\n\r\n";
+    if (tcp_write(pcb, msg, strlen(msg), 1) != ERR_OK) {
+        error("Could not write", 0);
+    }
+    return ERR_OK;
+}
+
+int main(void) {
+    /* Create and initialise variables */
+    struct netif   *netif = &netif_data;
+    struct ip_addr  ipaddr;
+    struct ip_addr  target;
+    struct ip_addr  netmask;
+    struct ip_addr  gateway;
+
+    Ticker tickFast, tickSlow, tickARP, eth_tick, dns_tick, dhcp_coarse, dhcp_fine;
+    char *hostname = "mbed-c3p0";
+
+    /* Start Network with DHCP */
+    IP4_ADDR(&netmask, 255,255,255,255);
+    IP4_ADDR(&gateway, 0,0,0,0);
+    IP4_ADDR(&ipaddr, 0,0,0,0);
+    IP4_ADDR(&target, 209,85,229,147); // www.google.co.uk
+
+    /* Initialise after configuration */
+    lwip_init();
+
+    netif->hwaddr_len = ETHARP_HWADDR_LEN;
+    device_address((char *)netif->hwaddr);
+
+    netif = netif_add(netif, &ipaddr, &netmask, &gateway, NULL, device_init, ip_input);
+    netif->hostname = hostname;
+    netif_set_default(netif);
+    dhcp_start(netif); // <-- Use DHCP
+
+    /* Initialise all needed timers */
+    tickARP.attach_us( &etharp_tmr,  ARP_TMR_INTERVAL  * 1000);
+    tickFast.attach_us(&tcp_fasttmr, TCP_FAST_INTERVAL * 1000);
+    tickSlow.attach_us(&tcp_slowtmr, TCP_SLOW_INTERVAL * 1000);
+    dns_tick.attach_us(&dns_tmr, DNS_TMR_INTERVAL * 1000);
+    dhcp_coarse.attach_us(&dhcp_coarse_tmr, DHCP_COARSE_TIMER_MSECS * 1000);
+    dhcp_fine.attach_us(&dhcp_fine_tmr, DHCP_FINE_TIMER_MSECS * 1000);
+
+    // Wait for an IP Address
+    while (!netif_is_up(netif)) {
+        device_poll();
+    }
+
+    /* Connect do google */
+    struct tcp_pcb *pcb = tcp_new();
+    tcp_connect(pcb, &target, 80, &connected_callback);
+
+    /* Give the signal that we are ready */
+    printf("entering while loop\n");
+    while (1) {
+        led = !led;
+        wait(0.1);
+        device_poll();
+    }
+}